metasploit-framework/lib/rex/mime/message.rb

module Rex
module MIME
class Message

	require 'rex/mime/header'
	require 'rex/mime/part'
	require 'rex/text'

	attr_accessor :header, :parts, :bound, :content

	def initialize(data=nil)
		self.header = Rex::MIME::Header.new
		self.parts  = []
		self.bound  = "_Part_#{rand(1024)}_#{rand(0xffffffff)}_#{rand(0xffffffff)}"
		self.content = ''
		if data
			head,body = data.split(/\r?\n\r?\n/, 2)

			self.header.parse(head)
			ctype = self.header.find('Content-Type')

			if ctype and ctype[1] and ctype[1] =~ /multipart\/mixed;\s*boundary=([^\s]+)/
				self.bound = $1

				chunks = body.to_s.split(/--#{self.bound}(--)?\r?\n/)
				self.content = chunks.shift.to_s.gsub(/\s+$/, '')
				self.content << "\r\n" if not self.content.empty?

				chunks.each do |chunk|
					break if chunk == "--"
					head,body = chunk.split(/\r?\n\r?\n/, 2)
					part = Rex::MIME::Part.new
					part.header.parse(head)
					part.content = body.gsub(/\s+$/, '')
					self.parts << part
				end
			else
				self.content = body.to_s.gsub(/\s+$/, '') + "\r\n"
			end
		end
	end

	def to
		(self.header.find('To') || [nil, nil])[1]
	end

	def to=(val)
		self.header.set("To", val)
	end

	def from=(val)
		self.header.set("From", val)
	end

	def from
		(self.header.find('From') || [nil, nil])[1]
	end

	def subject=(val)
		self.header.set("Subject", val)
	end

	def subject
		(self.header.find('Subject') || [nil, nil])[1]
	end

	def mime_defaults
		self.header.set("MIME-Version", "1.0")
		self.header.set("Content-Type", "multipart/mixed; boundary=\"#{self.bound}\"")
		self.header.set("Subject", '') # placeholder
		self.header.set("Date", Time.now.strftime("%a,%e %b %Y %H:%M:%S %z"))
		self.header.set("Message-ID",
			"<"+
			Rex::Text.rand_text_alphanumeric(rand(20)+40)+
			"@"+
			Rex::Text.rand_text_alpha(rand(20)+3)+
			">"
		)
		self.header.set("From", '')    # placeholder
		self.header.set("To", '')      # placeholder
	end


	def add_part(data='', content_type='text/plain', transfer_encoding="8bit", content_disposition=nil)
		part = Rex::MIME::Part.new

		if (content_disposition)
			part.header.set("Content-Disposition", content_disposition)
		end

		part.header.set("Content-Type", content_type)

		if (transfer_encoding)
			part.header.set("Content-Transfer-Encoding", transfer_encoding)
		end

		part.content = data
		self.parts << part
		part
	end

	def add_part_attachment(data, name)
		self.add_part(
			Rex::Text.encode_base64(data, "\r\n"),
			"application/octet-stream; name=\"#{name}\"",
			"base64",
			"attachment; filename=\"#{name}\""
		)
	end


	def add_part_inline_attachment(data, name)
		self.add_part(
			Rex::Text.encode_base64(data, "\r\n"),
			"application/octet-stream; name=\"#{name}\"",
			"base64",
			"inline; filename=\"#{name}\""
		)
	end

	def to_s
		msg = self.header.to_s + "\r\n"

		if self.content and not self.content.empty?
			msg << self.content + "\r\n"
		end

		self.parts.each do |part|
			msg << "--" + self.bound + "\r\n"
			msg << part.to_s + "\r\n"
		end

		if self.parts.length > 0
			msg << "--" + self.bound + "--\r\n"
		end

		# Force CRLF for SMTP compatibility
		msg.gsub("\r", '').gsub("\n", "\r\n")
	end

end
end
end